Introduction: Beginning in May and through October of this year, the Colombian TV channel
Caracol TV launched the show Nothing but the truth which underwent fi erce criticism from
its very start. The present article points out some of the fl aws of the show from an ethical,
legal, educational and mental health perspective. It also reveals some of the diffi culties encountered
in measurements when using the polygraph as a lie detection method. Methods:
The author performed 18 interviews with experts in different fi elds according to previously set
topics and previous research in the area. Results: The interviews refl ect serious misgivings
from an ethical point of view given the fact that in the show the persons participating in it
were paid to waiver their right to intimacy. The interviews also reveal that the polygraph is inaccurate as a lie detection method. They
also state that the show is ridden with serious
legal problems, possible mental health
problems for the participants involved, and is
inconvenient for education on the subject.

Introduction: Beginning in May and through October of this year, the Colombian TV channel
Caracol TV launched the show Nothing but the truth which underwent fi erce criticism from
its very start. The present article points out some of the fl aws of the show from an ethical,
legal, educational and mental health perspective. It also reveals some of the diffi culties encountered
in measurements when using the polygraph as a lie detection method. Methods:
The author performed 18 interviews with experts in different fi elds according to previously set
topics and previous research in the area. Results: The interviews refl ect serious misgivings
from an ethical point of view given the fact that in the show the persons participating in it
were paid to waiver their right to intimacy. The interviews also reveal that the polygraph is inaccurate as a lie detection method. They
also state that the show is ridden with serious
legal problems, possible mental health
problems for the participants involved, and is
inconvenient for education on the subject.